DevOps

Use when writing or changing tests, adding mocks, or tempted to add test-only methods to production code - prevents testing mock behavior, production pollution with test-only methods, and mocking without understanding dependencies

Guides creation of ChatGPT Apps with interactive widgets using OpenAI Apps SDK and MCP servers.Use when building ChatGPT custom apps with visual UI components, embedded widgets, or richinteractive experiences. Covers widget architecture, MCP server setup with FastMCP, responsemetadata, and Developer Mode configuration. NOT when building standard MCP servers withoutwidgets (use building-mcp-servers skill instead).

Guide for building applications on Cloudflare's edge platform. Use when implementing serverless functions (Workers), edge databases (D1), storage (R2, KV), real-time apps (Durable Objects), AI features (Workers AI, AI Gateway), static sites (Pages), or any edge computing solutions.

Automated E2E test infrastructure setup with Playwright, Vitest, MSW, and GitHub Actions. Generates 80%+ coverage tests based on REDR-prototype patterns.

Use when integrating MCP servers with Claude Code plugins - MCP configuration with transport types, scopes, and tool naming for November 2025 specifications

Generates complete, runnable RSpec tests for Rails models, services, controllers, and background jobs following project conventions. Use when new code is created without corresponding tests, when refactoring existing code, or when explicitly asked to add test coverage.

Financial systems and cost engineering

Best practices for creating Claude Code slash commands. Use this skill when creating, editing, or improving custom slash commands for Claude Code. Covers frontmatter configuration, dynamic features ($ARGUMENTS, bash execution, file references), command patterns (git workflows, multi-agent orchestration, code review), and helps decide when to use slash commands vs skills vs subagents.

Publish gate secrets scanning. Use for: safe_to_publish, scan for secrets, redact in-place. Determines publish gate status. Scan files for secrets (locations only - NEVER prints secret content). GitHub tokens, AWS keys, private keys, bearer tokens. Use ONLY in secrets-sanitizer. Invoke via bash .claude/scripts/demoswarm.sh secrets scan|redact.

Next.js 15 API route patterns, NextRequest, NextResponse, error handling, maxDuration configuration, authentication, request validation, server-side operations, route handlers, and API endpoint best practices. Use when creating API routes, handling requests, configuring timeouts, or building server-side endpoints.

Place 프로젝트 사용자 가이드를 Notion에 생성하는 스킬. 테이블, 색상, 코드블록, 화살표, 이모지를 활용한 가시성 높은 문서 생성. "가이드 만들어줘", "사용자 매뉴얼 작성해줘", "도움말 문서 생성해줘", "Notion에 문서 작성해줘" 요청 시 사용. Notion MCP (MCP_DOCKER) 필요.

Advanced tmux operations bundle for Miyabi multi-agent AI orchestration.Includes auto-recovery, health monitoring, task queue integration, and MCP server coordination. The definitive skill for AI agent workflows.

Docker and Kubernetes containerization best practices. Use when writing Dockerfiles, docker-compose files, or Kubernetes manifests. Triggers on mentions of Docker, container, Dockerfile, docker-compose, Kubernetes, k8s, pods, deployments, helm.

Update and clean up project documentation files (primarily .ai/features/, but also README.md, PROGRESS_TRACKER.md, CLAUDE.md, and other .md files). Use when user requests documentation cleanup, organization, or updates for any feature, module, or project documentation (e.g., 'update photo viewer docs', 'clean up README', 'organize documentation'). Removes code snippets, outdated details, and redundant information while preserving essential architectural decisions and technical context.

Selects and configures agents from the agents repo based on PRD tech stack.Runs after task decomposition, before specification generation.

Time series differencing for stationarity and trend removal

Optimiza políticas RLS de Supabase usando el patrón (select auth.uid()) para mejor performance. Usa cuando trabajes con RLS policies, auth.uid() reevaluación, o tareas 1.3 y 2.1 del PLAN_MEJORAS.md.

Apply wave physics principles when working on simulation code. Use this skill when editing files in src/waves/, src/simulation/, or when the user mentions wave behavior, shoaling, breaking, or foam physics.

Python conventions for SDKs and MCP servers

Industrial-strength NLP with spaCy 3.x for text processing and custom classifier training. Use when: installing spaCy, selecting models (en_core_web_sm/md/lg/trf), tokenization, POS tagging, named entity recognition, dependency parsing, training TextCategorizer models, troubleshooting errors (E050/E941 model errors, E927 version mismatch, memory issues), batch processing with nlp.pipe, or deploying models to production. Includes data preparation scripts, config templates, and FastAPI serving examples.